Proactive Filter, Coil & HVAC Maintenance

glen w filtersG&B Environmental is one of few certified filter specialists in the state of Minnesota. Our filter certification means we have demonstrated a thorough, up-to-date understanding of air filtration technology and high level of professionalism. In order to become certified, air filtration professionals must pass an extensive examination on the principles, methods and applications of air filtration.

On Time, Every Time

Customer service is our top priority. We focus on providing each customer with a custom solution that will save money, conserve energy and minimize risk and headaches. Our initial costs may not be the rock bottom option, but we are confident that we will be your best filtration, coil and duct option in the long run. We recognize that our job is more than replacing or maintaining filters, you count on us to make decisions that help your heating, cooling, water and HVAC systems running. Compliance with the NAFA Code of Ethics ensure that we will do our best for you every time.

G & B Environmental Specialties:

Improving Consumer Education on Filters, Coils, Ducts and HVAC Systems

We are working on a series of short lessons to help our customers better understand filters, coils, ducts, HVAC systems and the advantages of regular maintenance. Check them out below – sign up for updates at the right.

We take pride in our work and we figure the more you know the better we look!

Rule number 1—Meet the people you help.

It is imperative for us to see the actual, tangible impact of our time and effort for our work to have meaning and for us to be motivated to do it even better.  When we are able to physically see the positive impact of our decisions we make or the work we do, not only do we feel that our work was worth it, but also inspires us to work harder and do more.

How much does duct cleaning cost?

The fact of the matter is this: the average air duct cleaning for most homes costs between $300 and $500, with the price affected by factors like the size of the home, the number of ducts and their configuration. The average price for air duct cleaning is $35 per ventgf


Twin Cities best coil cleaning company

Your air conditioner has a tough job. It works hard throughout the summer to keep you as comfortable as possible, but things will inevitably happen that affect its performance. One of those things is dirt buildup on your condenser coil. That’s why condenser coil cleaning is an essential part of keeping your unit running as efficiently as possible.  Once coils are clean keep them clean with Prevent screens.  1-800-466-2018

G&B clean coils specialty

G&B clean coils specialty

G&B clean coils specialty

G&B clean coils specialty

York GB Environmental Protection screens

York GB Environmental Protection screens

Aaon Unit Protection screens

Aaon Unit Protection screens

Aaon RTU cottonwood filter gbenvironmental, inc.

Replacing air filters results in improved air quality, prolonged life of your HVAC system, and lower utility bills.

No one wants dirty air circulating in their lungs. We sometimes forget the consequences of breathing all the dust, debris, and pollutants that work their way into our HVAC systems. Take a look at the old filter that you pull out of your system and it will give you cause for thought. Changing your air filter is an easy fix to put your mind at ease.  We change 200,000 air filters per year.  Why not make it 200,001.  Call today to get it done.  On time–every time with G&B Environmental, Inc. 1-800-466-2018. 

Stop the dirt and hail before it becomes a problem with your HVAC performance this summer.

The best way to avoid this problem is to confront it well before it even happens — and there’s no better time than now.   Call 1-800-466-2018 and let’s build a plan to protect your  HVAC equipment before it’s to late.

3 inch U channel with screen to protect coil

RTU Unit with both hail protection and cottonwood protection

TrilliumSeries™ Condenser



7 Common Reasons Why Your Air Conditioner Is Not Cooling Properly

1. Dirty cooling coils. Your air conditioner has a set of indoor coils that absorb heat from your workplace air, as well as a set of outdoor coils that transfer heat from your workplace to the outdoors. If either of these coils have a layer of dirt on them it becomes much more difficult for heat to transfer between the coils and the air that’s blown over them. This can greatly reduce your system’s ability to remove heat from your workplace and the air that comes out of your vents will be warmer than it should be.

2. Refrigerant leak. Refrigerant is what flows through your air conditioner coils and actually moves the heat from inside your workplace to the outside condenser unit. If your system has a refrigerant leak it will not be able to adequately move heat out of your workplace. Your air conditioner will run, but will not provide optimal comfort.

3. Blocked condenser unit. Condenser units are located outside, where they can be blocked by all kinds of unsuspected problematic things. If your condenser unit is obstructed, it will not be able to adequately release heat from the condenser coils. This means that the heat that is removed from your system will not be released properly.

4. Dirty air filter. When your air filter is dirty, the amount of air that is able to blow over your evaporator coils is restricted. When this happens, much of the warm air that your air conditioner pulls from your workplace’s air will not actually be cooled.

5. Compressor problems. Your air conditioner’s compressor is responsible for making sure the refrigerant is at optimal pressure, making it one of the most important parts of your unit. Without it, your system would not be able to absorb heat from the rooms in your workplace and transfer it outside. If it starts to malfunction, your air conditioner has no chance of cooling your workplace properly.

6. Old system. When an air conditioner reaches the end of its operating life it will not be able to cool your workplace like it used to. This is just a natural fact of an air conditioner’s lifespan, which is why it’s important to replace your system when it is no longer able to perform effectively.

7. Improper thermostat settings. If your thermostat’s fan setting is set to “on” your air handler will blow air even when your system isn’t in a cooling cycle. As a result, some of the air that comes out of your vents will feel warm. You can adjust this by switching the fan setting to “auto” instead. Another setting to check is whether your system is in “heat” or “cool” mode. Your air conditioner will only be turned on if your thermostat is set to “cool.”

G&B Environmental, Inc. helps protect your people, processes and production.

It’s not what you say, it’s how you say it.

Placement of our air filters is our number one priority.  Mechanical air filters are made to get dirty and when they get dirty someone better change them.  G&B Environmental, Inc. is that someone.   Don’t get stuck in reactive mode call today and get proactive.  1-800-466-2018

Filters available for most applications. We offer quick response time to getting your filters on time – every time.


G&B Environmental, Inc. provides installation for critical hail and cottonwood protection for HVAC condensing coils (April, May, and June ) is here.

New RTU without hail and cottonwood protection

The Insurance Information Institute says hail causes about $1 billion in damage annually, with the highest number of claims reported in April, May and June. Hail guards like this one can help reduce some of the damage to HVAC systems.

RTU Unit with both hail protection and cottonwood protection

Don’t let the snow hold you back, Spring will be here before you know it.

G&B Environmental continues to install cottonwood protection screens, even when the only thing on our minds is snow. To refresh your memory, here is the Wikipedia definition of snow.

Snow refers to forms of ice crystals that precipitate from the atmosphere (usually from clouds) and undergo changes on the Earth’s surface.[2] It pertains to frozen crystalline water throughout its life cycle, starting when, under suitable conditions, the ice crystals form in the atmosphere, increase to millimeter size, precipitate and accumulate on surfaces, then metamorphose in place, and ultimately melt, slide or sublimate away. Snowstorms organize and develop by feeding on sources of atmospheric moisture and cold air. Snowflakes nucleate around particles in the atmosphere by attracting super cooled water droplets, which freeze in hexagonal-shaped crystals. Snowflakes take on a variety of shapes, basic among these are platelets, needles, columns and rime. As snow accumulates into a snowpack, it may blow into drifts. Over time, accumulated snow metamorphoses, by sintering, sublimation and freeze-thaw. Where the climate is cold enough for year-to-year accumulation, a glacier may form. Otherwise, snow typically melts seasonally, causing runoff into streams and rivers and recharging groundwater.

Major snow-prone areas include the polar regions, the upper half of the Northern Hemisphere and mountainous regions worldwide with sufficient moisture and cold temperatures. In the Southern Hemisphere, snow is confined primarily to mountainous areas, apart from Antarctica.[3]

Trane unit cottonwood screen installation.

RTU Hail Guard Protection

Trane unit cottonwood screen installation.

Understanding How Hail Damage Affects Commercial HVAC Units











–Hail damages a condenser coil when it impacts and bends the fins which prevents the appropriate airflow across the coil and inhibits cooling of the refrigerant.

–If the refrigerant is not cooled the system can overheat reducing the life of the unit. Coils are designed with extra capacity to allow for some reduction in airflow due to debris in the coils or minor bending of the fins, but proper practices to maintain unobstructed coils is important for extending the life of the unit.

–When a condenser unit is damaged by hail, it can often be restored to its pre-loss condition by “combing” the fins with a special tool. A fin comb has thin plastic or metal teeth that fit between the aluminum fins of the condenser coil. Because the fins are thin and malleable, a technician can straighten them by pulling a comb along the coil.

–This is typically a far more cost-effective method to restore the efficiency of the condenser.  If the deformation of the fins is too extensive, or if large hailstones have caused damage to the copper tubing itself, then it may be necessary to replace the coil.  The cost advantage of combing out the hail damage can be substantial in many cases. Combing involves a few hours of labor, and does not require the purchase of any materials; replacing a coil or an entire condenser unit requires installation labor, thousands of dollars worth of materials, and even crane rental fees for rooftop units.

Combing is the most efficient way to repair coils and by far the most common repair method recommended by G&B Environmental technicians. About 85% of G&B Environmental hail studies recommend repairing the unit by combing the coil. To comb a coil, a plastic or light gauge metal comb or a precision blade is inserted between the fins and pulled down to straighten them and allow the appropriate airflow to cross the coil. This is a tedious process and can take a contractor from two to four hours to perform at an hourly rate of $150 per hour, but $300 to $600 is much more reasonable than the cost to replace a coil ($3,000 to $5,000) or replace the RTU ($10,000 to $20,000).

G&B ENVIRONMENTAL, INC. 1-800-466-2018